How Jeans Work in Heredity

There are thousands of single gean characteristics in humans. These are necessary and sufficient for the development of disorder. So just like mendell's pea plants where wrinkled, whether you have wrinkled or smooth seeds, is due to a single genA mutation causes the normal smooth seeds to be wrinkled. The same thing's true with single gean disorders. And that's hwhay people learn about jeans by studying single jean characteristics.